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September Weather in Ardu, Estonia

Last updated: August 23, 2025

In September, the average temperature in Ardu, Estonia hovers around 12°C (54°F). During this time, temperatures can range from a chilly 0°C (32°F) to a pleasant 25°C (77°F). Expect 69 mm (2.7 in) of precipitation spread over 14 days, contributing to a notably high average humidity of 89%.

September Temperature in Ardu

In September in Ardu, the average temperature is 12°C (54°F), with maximums reaching 25°C (77°F) and minimums dropping as low as 0°C (32°F). This mild weather makes Ardu an ideal destination for travelers seeking a comfortable climate.

September Weather in Ardu: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Ardu, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Ardu, September typically has an average temperature of 12°C (54°F), with highs reaching up to 25°C (77°F) and lows dropping to around 0°C (32°F).
JanFebMarAprMayJunJulAugSepOctNovDec282732415161646154453830
Data source: Temperature data for Ardu generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Ardu

In Ardu in September, the precipitation amount is 69 mm (2.7 in) over the course of 14 days.

September Precipitation Trends in Ardu

The chart displays monthly precipitation patterns in Ardu, with values for each month alongside September’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September’s conditions compare to those of other months. In Ardu, September typically receives around 69 mm (2.7 inches) of precipitation spread over approximately 14 days.
JanFebMarAprMayJunJulAugSepOctNovDec4146484755667610469865355
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Ardu

In Ardu in September humidity is 89%. With an average temperature of 12°C (54°F), this humidity feels like a damp chill that envelops you, making travels slightly uncomfortable as you navigate through a thick, moist air that can cling to your skin and steal your warmth.

September Average Humidity in Ardu

This chart illustrates the average monthly humidity levels in Ardu, with September’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In September, average humidity in Ardu is approximately 89%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec95%93%90%87%73%77%80%84%89%93%93%93%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Ardu

In Ardu in September, the maximum UV index reaches 4, which corresponds to a moderate Exposure Category. With a time to burn of 30 minutes, it’s important to take precautions to protect your skin. You can find more details in the Hourly UV Index in Ardu for better planning.

Maximum UV Index Levels in Ardu for September

The chart shows the monthly maximum UV Index (UVI) for Ardu in September, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In September, the maximum UV index in Ardu typically reaches 4, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec123457764211
Data source: Ardu September UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How September Weather in Ardu Compares to Other Months

Weather in Ardu varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Ardu, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Ardu, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-2°C (28°F)41 mm (1.6 inches)95%low
February Weather-3°C (27°F)46 mm (1.8 inches)93%low
March Weather0°C (32°F)48 mm (1.9 inches)90%moderate
April Weather5°C (41°F)47 mm (1.9 inches)87%moderate
May Weather10°C (51°F)55 mm (2.2 inches)73%moderate
June Weather16°C (61°F)66 mm (2.6 inches)77%high
July Weather18°C (64°F)76 mm (3.0 inches)80%high
August Weather16°C (61°F)104 mm (4.1 inches)84%high
September Weather12°C (54°F)69 mm (2.7 inches)89%moderate
October Weather7°C (45°F)86 mm (3.4 inches)92%low
November Weather3°C (38°F)53 mm (2.1 inches)93%low
December Weather-1°C (30°F)55 mm (2.2 inches)93%low

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